Improvement in plaiting attachments for sewing-machines



W. HILDEBRAND.'

Plaiting Attac hments for Sewing-Machines.

UNITED STATES PATENT FFIC.

TVILLIAM HILDEBRAND, OF FORT 'VVAYNE, INDIANA.

Specification forming part of Letters Patent No. 15 1,978, dated June16, 1874 application filed September 8, 1873.

To all whom it may concern:

Be it known that I, WILLIAM HILDE- BRAND, of Fort TVayne, in the countyof Allen and State of Indiana, have invented certain new and usefulImprovements in Plaiting Attachments for Sewing-Machines; and I dohereby declare that the following is a full and exact descriptionthereof, reference being had to the accompanying drawings, and to theletters of reference marked thereon, in which like letters refer to likeparts in the different figures.

To enable others skilled in the arts to make and use my invention, Iwill proceed to describe its construction and operation.

In the drawings, Figure 1 is a side elevation. Fig. 2 is a detachedview. Fig. 3 is a detached view.

The nature of my invention consists in the arrangements and combinationof certain devices forming a sewing-machine attachment,

to be used for the purpose of plaiting cloth.

In the drawings, A represents a reciprocating bar, which slides insuitable guides a formed on and supported by clamp B. Said bar is, onits upper edge, provided with teeth, into which pawls O C alternatelytake. Said pawls are formed on the ends of parallel bars 1) D, slottedas seen at b I), and through said slots pins 0 0 pass, so as to formguides upon which said bars may freely reciprocate. On the inner ends ofsaid bars are formed recesses d (1, through which a wrist-pin, f, oncrankarm g passes.v Said bars D D are provided with sliding stops E E,which are secured by means of set-screws in any desired position. Thesestops, when set forward, contract the width of recesses (Z d, as may berequired for difl erent kinds of work. One recess may be entirelyclosed, so as to form a simple slot, in which the wrist-pin may work,while the recess in the other bar may be opened so wide that thewrist-pin will not in its vibration touch either side of the recess.

In practice it is necessary to increase or decrease the width of theplaits, also their fulness. By the combined action of these stops withthe recesses any desired size of plait may be obtained. h h representsprings, which serve to press the pawls to the bar A, and keep themconstantly in contact. F represents an adjustable stop, which is securedto the end of bar A. G represents a sliding bar,

which is secured by means of a set-screw to the other end of the bar A,and serves to graduate the width of the plaits. H represents anoscillating bar, which is pivoted as seen at i. This bar extends.horizontally beyond the movement of the pawls; its ends are so formedthat, when they come in contact with stops F and G, the said bar isoscillated, substantially as described, in a pending application byFredrick Sievers and myself. The stops there described are similar,except that in this case stop F is made adjustable, so as to reverse themovement of the bar A before it arrives at a point where the needle willsocure the plait, thus enablingthe operator by this adjustment to leavespaces of any desired width between a series of plaits. This is a matterof considerable importance in practice. I represents a foot-piece orcloth -presser, which is provided with an elliptic spring, 0, which issecured to the toe of said foot-piece, and extends back under it, asseen in the drawings, for the purpose of aiding in folding and securingthe plait while being stitched. Foot-piece I is recessed on its underside, as seen in the drawings at o, for the purpose of giving room forthe end of the plait-holder. K represents an elastic bar, which extendsfrom the foot-piece backward to where it is secured to the frame B.Directly over this bar, and sliding on it, is the plait-ibrining bladeor folder L, which is subs antially like that described in the caseabove referred to. An elliptic spring, J, is secured in a position sothat it impinges on the under surface of bar A, and serves to prevent itfrom moving too easily. I

What I claim as new, and desire to secure by Letters Patent, is

1. Reciprocating bars D D, slotted and recessed as seen at b b d d, pins0 c, pawls (J O, wrist-pin f, and crank-arm g, all being constructed andoperating in the manner and for the purpose specified.

2. The adjustable stop E, constructed and operating as and for thepurpose specified.

3. The adjustable stops E E, arranged, constructed, and operating as andfor the purpose specified.

TV. HILDEBRAND.

Attest:

H. F.W1LLsoN, J. T. LosEE.

